package power

import (
	"github.com/filecoin-project/go-address"
	"github.com/filecoin-project/go-state-types/abi"
	"github.com/filecoin-project/lotus/chain/actors/builtin"
	v0power "github.com/filecoin-project/specs-actors/actors/builtin/power"
	"github.com/filecoin-project/specs-actors/actors/util/adt"
)

type v0State struct {
	v0power.State
	store adt.Store
}

func (s *v0State) TotalLocked() (abi.TokenAmount, error) {
	return s.TotalPledgeCollateral, nil
}

func (s *v0State) TotalPower() (Claim, error) {
	return Claim{
		RawBytePower:    s.TotalRawBytePower,
		QualityAdjPower: s.TotalQualityAdjPower,
	}, nil
}

func (s *v0State) MinerPower(addr address.Address) (Claim, bool, error) {
	claims, err := adt.AsMap(s.store, s.Claims)
	if err != nil {
		return Claim{}, false, err
	}
	var claim v0power.Claim
	ok, err := claims.Get(abi.AddrKey(addr), &claim)
	if err != nil {
		return Claim{}, false, err
	}
	return Claim{
		RawBytePower:    claim.RawBytePower,
		QualityAdjPower: claim.QualityAdjPower,
	}, ok, nil
}

func (s *v0State) MinerNominalPowerMeetsConsensusMinimum(a address.Address) (bool, error) {
	return s.State.MinerNominalPowerMeetsConsensusMinimum(s.store, a)
}

func (s *v0State) TotalPowerSmoothed() (builtin.FilterEstimate, error) {
	return *s.State.ThisEpochQAPowerSmoothed, nil
}

func (s *v0State) ListAllMiners() ([]address.Address, error) {
	claims, err := adt.AsMap(s.store, s.Claims)
	if err != nil {
		return nil, err
	}

	var miners []address.Address
	err = claims.ForEach(nil, func(k string) error {
		a, err := address.NewFromBytes([]byte(k))
		if err != nil {
			return err
		}
		miners = append(miners, a)
		return nil
	})
	if err != nil {
		return nil, err
	}

	return miners, nil
}